Hart_Assignment 2 (1)

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Jan 9, 2024

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CyberRat - LAB #2 (Assignment 2) NAME: Monee Hart Part 1: Shaping 1. Take a snapshot of the multiple list graphs for the five sessions (including the initial shaping session) and include them below. 1
CyberRat - LAB #2 (Assignment 2) 2. Describe any differences in the level and pattern of lever pressing across the five sessions shown in your graphs above. Stinkyface slowly but increasingly pushed the lever as time passed each time so she could get more food. We can see the increase in lever pulls each time. When I was shaping her, it took a while for her to catch on. However, as I made it a point to reinforce the food to her whenever her face or nose touched the lever, she started to catch on. You can see it in bar presses 1 and 2, which are slow and low; it just takes off and accelerates when we continue on 3, 4, and 5 of the bar press graph. 2
CyberRat - LAB #2 (Assignment 2) 3. Do you see any evidence of satiation in any of the graphs? Describe features of the data that indicate satiation. (NOTE: Do not say "no" unless you are sure that I will not be able to find any evidence of satiation in your data!) From the data from the graph, Stinkface's lever pressing behavior increases over time during the reinforcement phase, signifying that she is not satiated and continues to find the food droppings reinforcing. However, during the extinction phase, I saw a decrease in lever-pressing behavior, which could mean that Stinkface has become satiated and is no longer motivated to press the lever for the food. I feel that the data may suggest satiation, but I think it could indicate other singularities, such as habituation, or she could have learned that the lever no longer delivers her a reward. So, I think additional data or analysis might be necessary or beneficial to settle the satiation question. Part 1: Extinction Baseline (Reinforcement) Minutes Lever Presses 1 I 2 I 3 IIIIIIIIIII 4 IIIII 5 IIIII 6 I 7 III 8 II 9 III 10 III 3
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CyberRat - LAB #2 (Assignment 2) Extinction Minutes Lever Presses 1 0 2 I 3 IIII 4 IIIIIIIIIIIIIII 5 IIIIIIIIIIII 6 IIIIIIIIIIIII 7 IIIIIIIIII 8 IIIII 9 IIII 10 0 Examine the frequency data that you collected in your data tables above : 1. How many times did your rat press the lever during the first five minutes of baseline (when he was still receiving reinforcement for pressing)? ________0______ 2. How many times did your rat press the lever during the first five minutes of extinction (when he was exposed to extinction for the first time and was no longer receiving reinforcement for pressing)? __32__________ 3. Did your rat's lever pressing show evidence of an "extinction burst"? Describe features of your data that support your answer. (NOTE: Do not say "no" unless you are sure that I will not be able to find any evidence of an extinction burst in your data!) Yes, we can see an extinction burst at minutes with the most lever pulls a 4 to 9, and after that, the pulls come to nothing. The data supports the evidence of an extinction burst when the increase in lever pressing during minutes 4-9 min mark decreases to nothing; after that, it eventually stops altogether. Examine the set of extinction graphs that you plotted (make sure to include the graph set above): 4
CyberRat - LAB #2 (Assignment 2) 4. How many sessions did it take your rat to reach the extinction criterion (i.e., press two or fewer times in a 10-minute session)? _____3___________ 5. Compare the graphs for all of the extinction sessions. Across the sessions, describe any differences in the (a) latency (i.e., the time between when the session started and the first response) and (b) total number of responses that occurred in the session. In the first session, we had 31 pulls. In the second, we had 11 pulls; in the last session, we had 0. The latency to the first response in the session was the first response (pull) that occurred once the session had started. The subject's last experience may incline it, anticipation of reinforcement, and current motivation levels. The behavior (pulling) decreased, probably due to the lack of reinforcement. 6. Did your rat's lever pressing show evidence of "spontaneous recovery"? Describe features of your data that support your answer. (Hint: Examine and compare the number of responses that occurred toward the end of one extinction session and the number of responses at the start of the next session.) No, the last session had 0 pulls on the lever. T he data provided indicates that because there were 0 pulls on the lever in the last session. It proposes that there was no spontaneous recovery, as the lever pressing did not rise or reemerge after a period of extinction. 5

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